Good question, the key bit is understanding for NDBs variation is measured at the aircraft and VORs measured at the VOR. Also straight line on Merc = Rhumb Line. Remember radio bearings follow great circles.
NDB - Hdg(T) = 152 + 295 = 447 -360 = 087(T) from A/C to NDB
As there is more than 2degrees ch long need to apply convergency.
CGY = CH Long (31) x sine 27 (.4540) = 14
Conversation Angle = 14/2 = 7
RL Track from A/C to NDB/VOR = 094 + 180 = 274 to plot on Merc from NDB.
GC Track at NDB/VOR = 087 + CGY (14) = 101 + 180 = 281(T)
281 - 8E at VOR = 273(M) = radial or QDR
Might help to draw a picture and there are a number of ways to do this question.
Ah happy days!